Marine Water Pump Impeller Kit – Replacement References for Sherwood, Jabsco and Johnson
Marine Water Pump Impeller Kit – Replacement References for Sherwood, Jabsco and Johnson is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Marine Water Pump Impeller Kit – Replacement References for Sherwoo...
Marine Water Pump Impeller Kit – Replacement References for Sherwood, Jabsco and Johnson is backordered and will ship as soon as it is back in stock.
Product Details
This high-performance marine water pump impeller kit is intended for engine cooling-water pump service on selected marine engines and pump assemblies. The listed reference applications include Caterpillar 3116, 3126 and 3208 engines; selected Cummins B Series, C Series and 6CTA8.3M applications; John Deere 6076 series engines; and numerous Sherwood P17-series water pumps.
Reference replacement numbers associated with this impeller include Sherwood 17000K-SHW and 21931, Jabsco 18958-0001-P, Johnson 09-704BT-1, Caterpillar 1W5664 and 7E0321, Cummins 3802444, 3897337, 3916852 and 3925236, and John Deere RE49896. Confirm the number, dimensions, shaft configuration and pump model before ordering.
- Durable neoprene rubber construction for marine cooling-water pump service.
- Threaded end intended to assist removal with a compatible impeller puller.
- Kit includes the impeller, O-ring, keys and plug as listed below.
- Aftermarket replacement component; brand names and reference numbers are used for identification only.
Part Number Matrix
Use the following references together with your original part and pump specifications. A number match alone does not confirm fitment for every engine configuration.
| Brand | Reference Part Number |
|---|---|
| Sherwood | 17000K-SHW, 21931 |
| Jabsco | 18958-0001-P |
| Johnson | 09-704BT-1 |
| John Deere | RE49896 |
| Cummins | 3802444, 3897337, 3916852, 3925236, 6CTA8.3M |
| Caterpillar | 1W5664, 7E0321 |
Engine and Pump Compatibility
The applications below are reference applications for comparison. Verify the exact engine model, pump assembly, original impeller and dimensions before installation.
| Brand | Model or Series | Reference Part Number | Application |
|---|---|---|---|
| Caterpillar | 3116, 3126, 3208 | 1W5664, 7E0321 | Engine cooling-water pump |
| Caterpillar | C7, C9 | 1W5664, 7E0321 | Check the exact pump and impeller specifications before ordering. |
| Cummins | B Series, including listed 6B 300 hp application | 3802444, 3897337, 3916852, 3925236 | Engine cooling-water pump |
| Cummins | C Series and 6CTA8.3M | 3802444, 3897337, 3916852, 3925236 | Marine engine cooling-water pump |
| John Deere | 6076 series | RE49896 | Engine cooling-water pump |
| Sherwood | P1710, P1710X, P1710-02, P1726, P1726X, P1732X, P1732-02, P176, P176X, P176-02 | 17000K-SHW | P17-series water pump |
| Sherwood | P1711, P1712, P1716B, P173, P1719, P1719F, P1722B, P1727FB, P1730F, P1731F | 17000K-SHW | P17-series water pump |
Technical Specifications
- Product Type
- Water pump impeller kit
- Material
- Neoprene rubber
- Overall Diameter
- 84 mm (3-5/16 in)
- Width
- 73 mm (2-7/8 in)
- Shaft Diameter
- 20 mm (0.787 in)
- Drive Type
- 3/16 in key drive
- Impeller Blades
- 12
- Keyway
- Single keyway with one threaded end for puller use
- Weight
- 0.47 kg (1.04 lb)
- Application
- Marine engine cooling-water pumping
What's in the Box
- 1 x impeller
- 1 x O-ring
- 2 x keys
- 1 x plug
Installation Notes
- Ensure the engine is switched off and cool. Close the water-intake seacock before servicing.
- Access the seawater pump and remove the screws securing the end cover plate.
- Remove the old impeller with a suitable impeller puller or carefully with needle-nose pliers.
- Clean the pump housing and cover plate, remove debris or old gasket material, and inspect for scoring or damage.
- Lightly lubricate the new impeller and housing with a water-based lubricant or glycerin. Do not use petroleum-based grease.
- Install the impeller with a gentle twisting motion and orient the blades to match the pump's direction of rotation.
- Fit the supplied O-ring in the correct groove or sealing position.
- Reinstall the cover plate and tighten the screws evenly. Do not overtighten.
- Reopen the seacock, start the engine, and check water discharge and the pump cover for leaks.
Troubleshooting and FAQ
How can I verify that this impeller is correct for my engine?
Compare the existing impeller's manufacturer number, outside diameter, width, shaft diameter, key arrangement and pump model with the information on this page. Confirm the exact engine and pump configuration before ordering; model-family similarity alone is not sufficient.
What are the symptoms of a worn or failed impeller?
Common symptoms include rising engine temperature, reduced or absent water flow from the exhaust, and visible cracks, stiffness, deterioration or missing blades when the impeller is inspected.
How often should the impeller be replaced?
Replace it according to the engine or pump manufacturer's maintenance schedule. Annual replacement or replacement every 100–200 operating hours is commonly used as a preventive interval, with more frequent inspection in sandy, silty or debris-laden water.
Is a special tool required?
A compatible impeller puller is recommended to reduce the risk of damaging the pump housing. The threaded end is intended to assist removal with a suitable puller.
Is this an OEM part?
No. This is an aftermarket replacement kit. The listed brand names and part numbers are reference identifiers and do not imply that the product is manufactured by or endorsed by those brands.
What should I do if the dimensions or original part differ?
Do not install the kit if the original part, shaft arrangement, keyway, dimensions or pump configuration differs. Confirm the application with the pump or engine manufacturer before purchase.
Safety and Important Information
- Always compare the original part, pump model and dimensions before purchase and installation.
- Close the water-intake seacock and allow the engine to cool before servicing the pump.
- Incorrect impeller selection or installation can cause loss of cooling-water flow and engine damage.
- Professional installation is recommended when the pump assembly or engine service procedure is unfamiliar.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for demanding real-world service.
- Global Fulfillment — Orders are processed promptly, with available delivery options shown at checkout.
- Manufacturer-Direct Value — We work with manufacturing partners to offer practical replacement parts at competitive prices.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
